Improvement in platform-rockers for furnit



A. HENTSHEL'. Platform-Rocker for Furniture.

N0. 222,398. Patented Dec. 9. 1879-.

N-PEYEHS. PHOTO-UTHOGRAPHER, WABPNNGYON, D Q

UNITED STATES PATENT QFFIQEI'...

AUGUST .IIENTsHEL, on CINCINNATI, OHIO.

IMPROVEMENT IN PLATFORM-ROCKERS FOR FURNITURE.

, Specification forming part of Letters Patent No. 222,398, dated December 9, 1879; application filed July 29, 187 9, v

To all whom it may concern Be it known that I, AUGUST HENTSHEL, of Cincinnati, Hamilton county, Ohio, have invented new and useful Improvements in Platform-Rockers for Furniture, of which the following is a specification.

The invention relates to a peculiarly formed and attached duplex-plate spring, whereby the rocking member is restricted to its proper place and range of oscillation.

This spring consists of 'two plates or bands, which are respectively bolted at their midlength to the mid-widthof the platform and of the rocking member, and of which the lower plate has upturned and the upper platedownturned ears or extremities, which extremities are pivoted to one another at the contiguous ends of the respective plates. Of these plates the lower one is preferably straight, or nearly so, and the upper one arch-like. I y

V In the accompanying drawings, Figure 1 is a vertical fore-and-aft section of a platform rocking chair embodying the first-named feature of my invention. Fig. 2 is a section at the line a; m, Fig. 1. Figs. 3 and 4: show my spring-coupling ears or lips in end elevation I and detached. -Figs. 5 and 6 are, respectively,

a fore-and-aft section and a perspective view of my catch. l

A represents the base or platform, consisting of sides A, united by cross-rail A. The

sides A constitute, as usual,.the immediate supports for the rockers B of the rocking member B.

The rockers B are, at that point of their curvature which is lowest when at rest, united by a stretcher, B". v

To the rail A and the stretcher B, at the mid-len gth of these members, are, respectively,

bolted (O) the lower and the upper plates, D and E, of my duplex spring. Of these plates the lower plate, D, may be straight, and the upper plate, E, arching, as shown, when the parts are in their normal or inactive positions.

The top surface of rail A may have the represented crowning form.

Bolted to each extremity of the lower plate, D, is an upturned lip, F, perforated for pivot G. that connects it to a downturned lip, H,

face of the upturned lip F, as in the present illustration.

In operation, the effect of oscillation of the rocking member in either direction is to bow the plates D and E, and to this effect, as the rocking.member approaches the limit of its oscillation, is added the torsional resistance of both plates incident to the impact oflip H against one or other stop, for f, of lip F. t

The effect is to limit, without jar or concussion, the oscillations of the rocking member,

and, in addition thereto, tohold it to its proper place upon the platform.

In order to enable the rocking member to be set at any desired degree of back-tip there may be provided a segment-rack projection,

L, from the stretcher B, which may be capable of receiving a latch-bar, I, pivoted at i to I the platform.

A hook or keeper, J, anda slotted plate, K, serve to restrict the latch-bar I to its proper movement into or out of engagement'with the rack, and to hold it against lateral deflection.

So long as the chair or other rocking member remains occupied the weight of the occupant prevents any accidental escape of the latch-barIfrom the rack L 5 but, on the chair becoming vacant, the latch can be easily disengaged from the rack and the rockingmemi ber liberated for its customary oscillations. I claim as new and of my invention-# 1. In the described combination with the stationary and oscillating members of a plat form-rocker, the duplexplate spring 1) E,

bolted to said members at the latters mid-, width, and having their component plates coupled at their extremities by the respect. ively up. and downturned lips F and H,.and

pivots G, in line with the springs, substan- In testimony of which invention I hereunto tially as set forth. set my hand.

2. The combination, in a platform-rocker, 0f the duplex-plate spring D E F G H and HENTSHEL' the stop-projections ff from the terminal Attest: lips of one of the component plates, substan- GEO. H. KNIGHT, tially as set forth. L. H. BOND. 

